[SpudRider]

I'm confident the ZS177MM (NC250) engine is very good, and reliable. Nevertheless, I hope suitable sprockets are available for the larger rear wheel. The cushion hub does not employ a readily available sprocket. When I converted my Zongshen ZS200Y-2 from a 15-inch rear wheel to an 18-inch rear wheel, I needed to install a larger rear sprocket merely to maintain the stock gear ratio.

Most riders also prefer to experiment with several sprocket ratios to find the ideal combination for the different types of terrain they ride. I just hope we don't get stuck with a single rear sprocket which is too small for the larger rear wheel.